Jan-willem Meyling
Chief Technology Officer at FreshMinds
Amsterdam, North Holland, Netherlands
Summary
🤩
Rockstar🎓
Top SchoolJan-Willem Meyling is a pragmatic CTO and entrepreneur with 13 years of experience scaling engineering teams and transforming companies into tech frontrunners from Amsterdam. He combines hands-on backend expertise—demonstrated by notable contributions to Hibernate ORM, Blaze-Persistence, Hypersistence-Utils and QueryDSL—with product leadership across startups and education platforms like AthenaStudies and CeresNexus. Comfortable across cloud-native stacks (OpenShift, Keycloak, OpenStack) and full-stack systems, he excels at turning complex data problems into performant, maintainable solutions. Jan-Willem’s background in IoT, GIS/3D visualization and large-scale data pipelines reflects a rare mix of systems, web and embedded experience. A habitual open-source contributor, he often fixes deep ORM and JPA edge cases, showing strong domain knowledge of persistence internals that few CTOs possess. He values clear communication, integrity and continuous learning while building collaborative teams that ship reliable software.
13 years of coding experience
12 years of employment as a software developer
Highschool Voortgezet Wetenschappelijk Onderwijs (VWO), Highschool Voortgezet Wetenschappelijk Onderwijs (VWO) at Eerste Christelijk LyceumMinor Entrepreneurship, Minor Entrepreneurship at University of AmsterdamBachelor’s Degree Computer Science, Bachelor’s Degree Computer Science at Delft University of Technology
Dutch, English
Stackoverflow
3,814reputation
232kreached
151answers
26questions
java
top-5%
Github Skills (30)
object-mapping10
postgresql10
annotations10
testing10
java-persistence-api10
enums10
java10
annotation-processing10
javas10
hibernate10
persistent10
orm10
persistence10
jpa10
guava9
Programming languages (19)
Github contributions (5)
Blazebit/blaze-persistence
Sep 2016 - Aug 2022
Rich Criteria API for JPA providers
Role in this project:
Back-end Developer
Back-end DeveloperContributions:47 reviews, 96 commits, 62 PRs in 5 years 11 months
Contributions summary:Jan-willem made extensive contributions to the project, demonstrating a strong understanding of JPA, QueryDSL, and database interactions. They focused on enhancing the Criteria API, adding features like window functions, support for different join types, and improvements to CTE (Common Table Expression) handling. Their work included bug fixes, performance optimizations, and test case creation, ensuring the robustness and functionality of the JPA provider. They also integrated QueryDSL support, increasing the versatility of the project.
criteria-apijpajavasqlcte
querydsl/querydsl
Jan 2020 - Oct 2022
Unified Queries for Java
Role in this project:Back-end Developer
Back-end DeveloperContributions:2 releases, 142 reviews, 270 commits in 2 years 9 months
Contributions summary:Jan-willem primarily contributed to enhancing the querydsl project by implementing features for the APT (Annotation Processing Tool) module. Their work involved integrating service loaders for extension registration and binding the ProcessingEnvironment within the APT module. Furthermore, they modified the core JPA module by introducing alternative overloads and supporting generics, addressing existing issues and enhancing the project's capabilities. Additional improvements included enabling Java 8 compilation and removing Guava dependencies.
java
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